Backwater-trap



H. BOLAND. BACKWATER TRAP. APPLICATION man 0c.30, 1919.

' Patented ct. 5,1920.

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llllllll! *rll] I PATENT OFFHCE.

HARRY BOLAND, OF CHICAGO, ILLINOIS.

BACKWATER-TRAP.

Application filed December To all to 7mm it may concern:

Be it known that 1, HARRY BOLAND, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Backwater-'l rap, of which the following is a specification. v

This invention relates to improvements in back water relief valves, the principal object thereof being to provide a valve of this type which acts automatically and efiiciently to permit the discharge of water and sewage from the house.system and the like, and to prevent water and sewage backing up into the house system or the like in the event of stoppage, flood conditions, etc.

Further objects of this invention will be apparent from a consideration of the following description.

To the accomplishment of the foregoing and such other objects as may be hereinafter described, my invention consists in the construction, combination and arrangement of parts hereinafter described and then sought to be defined in the appended claims, reference being had to the accompanying drawings forming a part hereof, and which show merely for the purpose of illustrative disclosure a preferred embodiment of my invention, it being expressly understood that various changes may be made in practice within the scope of the claims without db gressing from my inventive idea.

In the drawings- Figure 1 is a plan view of a device con structed to embody my invention showing inlet and outlet pipes connected thereto.

Fig. 2 is a side elevation of the same, parts being shown in longitudinal vertical sections and in dotted lines to facilitate the disclosure.

Fig. 3 is a vertical transverse section taken substantially on line 3-3 of Fig. 2.

Referring now to the drawings, the nuieral 1 designates the casing of the valve, which is formed with the inlet extension 2 and the discharge extension 3, to which the inlet and discharge pipes or conduits 4 and 5 are respectively connected. The casing 1 is substantially U-shaped in vertical cross sec tion (see Fig. 3) and has the flat top or cover plate 6, screwed or otherwise secured to a flanged seat 7 The upper part of the chamber or compartment 8 formed within the casing is provided with the relief port 9.

The inlet connection or extension 2 termi- Specification of Letters Patent.

Patented Oct. 5, 1 9.20.

30, 1919. Serial No. 348,395.

nates within the chamber or compartment 8 and has its end cut or otherwise formed at an incline to receive the brass seat 10 which is suitably secured thereon and has the flap valve 11 pivoted thereto as at 12. This valve is extended to the other side of its pivot in the form of a float 13, adjusting weight 141 being movable on the flap valve 11 so that it is normally held in the balanced position shown in Fig. 2.

A partition 15 is secured to the inside of the other wall of the casing and extends downwardly across the opening into the discharge extension 3. The upper part 16 of this partition is fixed and immovable and provided with a plurality of openings or passages 17 therethrough. The lower part 18 of the partition is hinged or pivoted to the upper part at 19, but is movable in the direction of discharge flow1 only, having stops or abutments 20 for limiting its movement in the other direction. It is to be noted that this lower movable part of the partition is shaped to fit the casing but is smaller in dimension so as to leave a space 21 around its edge. The partition 15, having the openings 17 and the hinged flap 18, are for the purpose of controlling the back water. hen the back water flow sets in, the hinged part 18 will close. preventing the backing up of any solid matter, the openings 17 permitting the flow of water into the chamber or compartment 8 on to the flap valve 11, so as to force the same to its seat and prevent the rise of the back water into the system.

The operation of this device is obvious. Under normal condition. the water and sewage will readily flow through from inlet to discharge but where there is a stoppage or the level of the water in the discharge system is raised sufiicientlyto cause'back water as in flood conditions, the movable part 18 of the partition is held closed in its full line position in the drawing and the pressure and flow of the back water through the openings 17 of the upper part thereof, forces the flap valve 11 shut against its seat, thereby holding the same closed until the condition is relieved and preventing the water, etc., from backing up into the house system or the like.

What I claim is 1. A device of the character described including combination a casing having an inlet connection and an'outlet connection, a

' let connection, the lower part of said partition being movable in the direction of discharge fiow only, and the upper part of said partition being provided with openings therethrough.

3. A device of the character'described including in combination a casing having an inlet connection "in the lower part thereof, a valve having a float extension and pivoted so as to swing to close said inlet connection, said valve being normally open, said casing having an outlet connection, a partition extending across the casing adjacent the outlet connection, the upper part of said partition being stationary and provided with openings therethrough and the lower part of said partition being hinged to said stationary part, and abutments on said casing for preventing the movement of said hinged part of said partition in the direction of inflow.

- HARRY BOLAND. 

